CN117627632A - Design method and device of underground wireless short transmission and resistivity measurement integrated antenna - Google Patents
Design method and device of underground wireless short transmission and resistivity measurement integrated antenna Download PDFInfo
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- CN117627632A CN117627632A CN202210973363.8A CN202210973363A CN117627632A CN 117627632 A CN117627632 A CN 117627632A CN 202210973363 A CN202210973363 A CN 202210973363A CN 117627632 A CN117627632 A CN 117627632A
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- 238000005259 measurement Methods 0.000 title claims abstract description 53
- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000013461 design Methods 0.000 title claims abstract description 16
- 239000000696 magnetic material Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 5
- 230000001012 protector Effects 0.000 claims 2
- 210000002445 nipple Anatomy 0.000 abstract description 11
- 230000005855 radiation Effects 0.000 description 13
- 238000007789 sealing Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a design method and a device of an underground wireless short transmission and resistivity measurement integrated antenna, wherein the design method comprises the following steps: a column-shaped groove is formed along the outer wall of the metal drill collar; an antenna body is arranged in the groove, and the method comprises the following steps: magnetic materials are attached to the inner wall of the groove, and insulation treatment is carried out between the magnetic materials and the metal drill collar and other antenna materials in the groove; and winding two groups of insulated wire coils on a cylinder which is positioned in the groove and is attached to the magnetic material along the direction perpendicular to the axis of the metal drill collar, wherein one group of insulated wire coils is used for transmitting and receiving wireless short transmission signals, and the other group of insulated wire coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals. The invention saves the length of the transmitting nipple, enriches the measurement parameters and reduces the influence on the slope.
Description
Technical Field
The invention relates to the technical field of near-bit measurement while drilling systems, in particular to a method and a device for designing an underground wireless short transmission and resistivity measurement antenna.
Background
Through exploration and development for many years, the conventional oil and gas resources of the shallow layers and the shallow seas on the land in China are completely developed, and unconventional oil and gas resources become main targets for development, so that higher requirements are put on exploration and development technologies, and high-end geosteering equipment is required to support. In conventional geosteering equipment, the geological and engineering parameter measurement sensors are far from the drill bit, so that the information is lagged and cannot meet the operation requirements of complex geological environments, and therefore near-bit measurement while drilling systems are increasingly favored. The system can timely acquire geological and engineering parameters near the drill bit, provides more accurate guiding basis, further improves the drilling meeting rate of the reservoir, reduces the operation risk and reduces the cost, and the system becomes a stock system in geological guiding operation of large-displacement horizontal wells, wells with complex structures and the like.
The near-bit measurement while drilling system consists of a data measurement and transmission nipple, a data receiving nipple and an MWD measurement while drilling system, wherein the data measurement and transmission nipple is used for measuring geological and engineering parameters near the bit and transmitting the parameters to the data receiving nipple by crossing a screw drilling tool through a wireless short transmission antenna, and the data receiving nipple uploads the received data to the ground through the MWD system. The data measurement and emission nipple is placed between the screw drilling tool and the drill bit, the nipple should be as short as possible in order not to affect the build-up rate of the system, but in order to realize more geological and engineering parameter measurement, a plurality of corresponding sensors are required to be arranged on the nipple, so that more optimization design work is required in terms of structure, and the nipple should be as short as possible under the same measurement parameter type.
Gamma and resistivity parameters are commonly used measurement parameters in geosteering operations, but most near-bit measurement systems currently only have gamma measurement functions, and if the integrated resistivity measurement function increases the length of the data measurement and emission nipple, thereby affecting the deflecting function.
Disclosure of Invention
The invention aims to solve the technical problem that the resistivity measurement function is integrated in the near-bit measurement system, but the length of the transmitting pup joint is not increased.
In order to solve the technical problems, the invention provides a design method of an underground wireless short transmission and resistivity measurement integrated antenna, which adopts the following technical scheme:
a column-shaped groove is formed along the outer wall of the metal drill collar; an antenna body is arranged in the groove, and the method comprises the following steps: magnetic materials are attached to the inner wall of the groove, and insulation treatment is carried out between the magnetic materials and the metal drill collar and other antenna materials in the groove; and winding two groups of insulated wire coils on a cylinder which is positioned in the groove and is attached to the magnetic material along the direction perpendicular to the axis of the metal drill collar, wherein one group of insulated wire coils is wound on the other group of insulated wire coils, one group of insulated wire coils is used for transmitting and receiving wireless short transmission signals, and the other group of insulated wire coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals.
Further, the space in the groove except for the two sets of insulated wire coils and the magnetic material is filled with an insulating filling material.
Furthermore, an antenna protection is arranged in the groove and outside the antenna body, an antenna protection cover is arranged outside the groove, a slot is formed in the antenna protection cover along the direction perpendicular to the winding direction of the insulated wire coil, and a filling material with insulativity is filled in the slot.
Furthermore, the magnetic material has higher magnetic conductivity and magnetic saturation strength and lower resistivity; all properties of the magnetic material have consistency under normal temperature and underground high temperature environments.
Further, the two groups of insulated wire coils are formed by winding a plurality of turns of insulated wires which are closely arranged, the thickness of the insulating layers of the insulated wires is 0.02mm-0.05mm, the wire diameter is 0.1mm-1.0mm, and the number of turns is 1-300.
According to still another aspect of the present invention, there is provided an integrated antenna device for downhole wireless short transmission and resistivity measurement, which adopts the following technical scheme:
the underground wireless short transmission and resistivity measurement integrated antenna device comprises an antenna body which is arranged in a column-shaped groove formed along the outer wall of a metal drill collar; the antenna body comprises a magnetic material, a first coil group and a second coil group, wherein the magnetic material is attached to the inner wall of the groove and is subjected to insulation treatment with the metal drill collar, the first coil group and the second coil group are a plurality of turns of insulated wires which are wound in the drill collar groove along the direction perpendicular to the drill collar shaft and attached to the column body of the magnetic material, the first coil group is wound on the second coil group, one group of coils is used for transmitting and receiving wireless short-transmission signals, and the other group of coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals.
Further, a space other than the magnetic material, the first coil group, and the second coil group is filled with a filling material having insulation property in the recess.
Furthermore, an antenna protection cover is arranged outside the antenna body, a slot is designed on the antenna protection cover along the direction perpendicular to the winding direction of the coil assembly, and the slot is filled with an insulating filling material.
Furthermore, the magnetic material is required to have higher magnetic permeability and magnetic saturation strength and lower resistivity; all properties of the magnetic material have consistency under normal temperature and underground high temperature environments.
Further, the first coil group and the second coil group are formed by winding a plurality of turns of insulating wires which are tightly arranged, the thickness of the insulating wires is 0.02mm-0.05mm, the wire diameter is 0.1mm-1.0mm, and the number of turns is 1-300.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a design method of an underground wireless short transmission and resistivity measurement integrated antenna, which saves the length space of a transmitting short section, enriches measurement parameters and reduces the influence on the slope. The design proposal provided by the invention considers the design of the magnetic material, and compared with the conventional design which only considers the lead, the design proposal more comprehensively considers the factors influencing the antenna performance, and can more effectively improve the working performance of the antenna. In addition, the antenna body and the antenna protective cover are decomposed into two parts which respectively bear the sealing function, which is equivalent to two sealing, so that the adaptability of the antenna in a high-pressure environment is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 shows a schematic diagram of an integrated antenna design provided in accordance with a specific embodiment of the present invention.
Fig. 2 shows a schematic diagram of an integrated antenna protection cover according to an embodiment of the present invention.
Wherein the above figures include the following reference numerals:
1. a metal drill collar; 2. a magnetic material; 3. a first coil group; 4. a second coil group; 5. a first filler material; 6. a connector; 7. an antenna protection cover; 8. slotting; 9. and a second filler material.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The integrated resistivity measurement function in the near-bit measurement system can improve the geosteering operation effect, but simultaneously increases the requirements on the length of the data measurement and emission pup joint, and in order to save the length space of the pup joint, the invention provides a design method and a device of an underground wireless burst and resistivity measurement integrated antenna, which enriches measurement parameters and simultaneously reduces the influence on the slope.
As an embodiment of the invention, a design method of an underground wireless short-transmission and resistivity measurement integrated antenna is provided, which specifically comprises the following steps:
step 1, a column-shaped groove is formed along the outer wall of a metal drill collar used in drilling operation and is used for arranging an antenna body and an antenna protection cover.
Step 2, arranging an antenna body in the groove
And 2.1, attaching and placing a magnetic material on the inner wall of the drill collar groove for increasing the radiation resistance of the antenna.
Insulating treatment is performed between the magnetic material and other materials of the metal drill collar and the antenna in the groove, and the insulating mode is not limited, such as coating an insulating coating.
Preferably, the magnetic material is required to have higher magnetic permeability and magnetic saturation strength for increasing the radiation resistance of the antenna, thereby improving the radiation efficiency of the antenna; the resistance is lower, and the eddy current loss is reduced; all properties of the magnetic material are consistent under normal temperature and underground high temperature environments, and the components of the magnetic core material are not limited, such as ferrite and other materials.
And 2.2, winding two groups of insulated wire coils on a cylinder which is positioned in a drill collar groove and is attached to the magnetic material along the direction perpendicular to the drill collar shaft, and the insulated wire coils are used for radiating outwards and receiving electromagnetic wave signals.
One group of insulated wire coils is wound on the other group of insulated wire coils, one group of insulated wire coils is used for transmitting and receiving wireless short-transmission signals, the other group of insulated wire coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals, and specific corresponding relations are not limited. Because the working frequency of the antenna for wireless short transmission is lower, the antenna is in the vicinity of 1-10kHz, preferably, a plurality of turns of insulating wires are wound in a limited groove space, so that the radiation resistance is improved, the insulating wires are small in resistance, thick in wire diameter and thin in insulating layer, and the insulating wires are tightly arranged when wound, so that the loss resistance is reduced, the radiation efficiency of the antenna is improved, and the distance of wireless short transmission is increased. Because the working frequency of the antenna for measuring the resistivity of electromagnetic waves is near 100k-2MHz and is higher than the working frequency of wireless short transmission, preferably, a plurality of turns of insulating wires are wound in a limited groove space to improve the radiation resistance, the insulating wires are smaller in resistance, thicker in wire diameter and thinner in insulating layer, and the insulating wires are closely arranged when wound, so that the loss resistance is reduced, and the radiation efficiency of the antenna is improved. The specific wire material, insulation layer thickness, number of turns and wire diameter are not limited, and in one example pure copper wire, insulation layer thickness 0.02mm-0.05mm, wire diameter between 0.1mm-1.0mm and number of turns between 1-300 are selected.
And 3, connecting the two groups of insulated wire coils and the electric system in an insulating and sealing manner through connectors, and realizing insulating and sealing connection in a high-temperature and high-pressure underground environment.
In an embodiment of the present invention, the antenna body is sealed and supported.
The antenna body sealing and supporting treatment method comprises the following steps: and filling the space except for the two groups of insulated wire coils and the magnetic material in the grooves with an insulating filling material.
The filling material plays a role in fixedly supporting the two groups of insulated wire coils and the magnetic material, and plays a certain sealing role under the condition that electromagnetic waves do not influence passing through, so that the two groups of insulated wire coils and the magnetic material are not damaged by direct flushing of slurry. The material performance is required to be insulated, has very good adhesion with the drill collar wall, and has higher hardness and can resist the underground high-pressure environment. The specific material composition is not limited, and epoxy resin glue and the like can be selected.
In an embodiment of the invention, an antenna protection cover is disposed in the groove and outside the antenna body.
The antenna protection cover is used for protecting the antenna body from being washed by mud and abrasion of a well wall. The material of the protective cover is not limited, and is generally consistent with the material of the drill collar.
Furthermore, a slot is designed on the antenna protection cover along the direction perpendicular to the winding direction of the two groups of insulated wire coils.
The slots are designed to ensure that there is sufficient signal to pass through the antenna protection cover. The specific size and shape of the slot are not limited, but in order to ensure the passing strength of the signal, the width and number of the slot should be increased as much as possible without affecting the mechanical strength, and specific size parameters are not limited, for example, the ratio of the slot area to the antenna protection cover area is 1/3-1/2.
Further, the protective cover is filled with an insulating filler material at the groove.
The filler material requires insulation and has very good adhesion properties to the antenna shield for passing electromagnetic waves and preventing mud in the wellbore from entering the antenna shield and is resistant to the high pressure flushing environment downhole without falling off the antenna shield. The specific material composition is not limited, and the same material composition as the first filling material may be selected.
Based on the design method of the underground wireless short transmission and resistivity measurement integrated antenna, the invention provides an underground wireless short transmission and resistivity measurement integrated antenna device.
As shown in fig. 1, as an embodiment of the present invention, the component parts of the integrated antenna device for underground wireless short transmission and resistivity measurement provided include an antenna body, which is disposed in a column-shaped groove formed along the outer wall of a metal drill collar 1. The antenna body comprises a magnetic material 2, a first coil group 3, a second coil group 4 and a first filling material 5.
The magnetic material 2 is attached to the inner wall of the groove, and is subjected to insulation treatment with the metal drill collar 1, the first coil group 3, the second coil group 4 and the first filling material 5, and the insulation mode is not limited, such as coating an insulation coating. Preferably, the magnetic material 2 has higher magnetic permeability and magnetic saturation strength for increasing the radiation resistance of the antenna, thereby improving the radiation efficiency of the antenna; the resistance is lower, and the eddy current loss is reduced; all properties of the material are consistent under normal temperature and underground high temperature environments, and the components of the magnetic core material are not limited, for example, ferrite and other materials can be used.
As shown in fig. 1, the first coil set 3 and the second coil set 4 are multi-turn insulated wires wound in the drill collar groove along the direction perpendicular to the drill collar shaft and attached to the column body of the magnetic material 2, and are used for radiating and receiving electromagnetic wave signals outwards. The first coil set 3 is wound around the second coil set 4, wherein one is used for transmitting and receiving wireless short-transmission signals, and the other is used for transmitting and receiving electromagnetic wave resistivity measurement signals, and the specific correspondence is not limited.
Because the working frequency of the antenna for wireless short transmission is lower and is near 1-10kHz, preferably, the insulated wire with smaller resistance, thicker wire diameter and thinner insulating layer is selected, and a plurality of turns of insulated wire are wound in a limited groove space so as to improve the radiation resistance and are closely arranged when a plurality of turns of insulated wire are wound, so that the loss resistance is reduced, the radiation efficiency of the antenna is improved, and the distance of wireless short transmission is improved.
Because the working frequency of the antenna for measuring the resistivity of electromagnetic waves is near 100k-2MHz and is higher than the working frequency of wireless short transmission, preferably, the insulated wires with smaller resistance, thicker wire diameter and thinner insulating layer are selected, and a plurality of turns of insulated wires are wound in a limited groove space so as to improve the radiation resistance and are closely arranged when the plurality of turns of insulated wires are wound so as to reduce the loss resistance and further improve the radiation efficiency of the antenna.
The specific wire materials, insulating layer thicknesses, turns and wire diameters of the first coil set 3 and the second coil set 4 are not limited, and pure copper wires and insulating layer thicknesses of 0.02mm-0.05mm are selected in an example, the wire diameters are 0.1mm-1.0mm, and the turns are 1-300.
The first coil set 3, the second coil set 4 and the electrical system are connected through a connector 6, and an insulating sealing function of a connecting position is achieved in a downhole high-temperature high-pressure environment. The type of the specific connector is not limited.
In an embodiment of the present invention, the method for sealing and supporting the antenna body includes: the space except the magnetic material 2, the first coil group 3 and the second coil group 4 in the drill collar groove is filled with a first filling material 5, so that the magnetic material 2, the first coil group 3 and the second coil group 4 are fixedly supported, and a certain sealing effect is achieved under the condition that electromagnetic waves do not influence passing through, and the drill collar is not damaged by direct flushing of slurry. The first filling material 5 is required to be insulated, has very good adhesion with the drill collar wall, and has higher hardness and can resist the high-pressure environment in the pit. The specific material composition is not limited, and epoxy resin glue and the like can be selected.
In an embodiment of the invention, an antenna protection cover 7 is arranged outside the antenna body to protect the antenna body from being washed by mud and abrasion of a well wall. The material of the antenna protection cover 7 is not limited, and is generally the same as the drill collar material.
Further, in order to ensure that a sufficient signal can pass through the antenna protection cover 7, a slot 8 is formed in the antenna protection cover 7 in a direction perpendicular to the winding direction of the coil assembly, as shown in fig. 2. The size and shape of the slots 8 are not limited, but in order to ensure the passing strength of the signal, the width and number of the slots 8 should be increased as much as possible without affecting the mechanical strength, and the specific size parameters are not limited, and in one example, the ratio of the area of the slots 8 to the area of the antenna protection cover 7 is between 1/3 and 1/2.
Further, the slot 8 is filled with a second filling material 9, and the second filling material 9 is a filling material at the slot 8 of the protective cover, requires insulation, has very good adhesion performance with the antenna protective cover 7, is used for passing electromagnetic waves and preventing mud in a shaft from entering the antenna protective cover 7, and can resist a high-pressure flushing environment in the pit without falling off from the antenna protective cover 7. The specific material composition of the second filling material 9 is not limited, and for example, the same material composition as that of the first filling material 5 may be selected.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A design method of an underground wireless short transmission and resistivity measurement integrated antenna is characterized in that,
a column-shaped groove is formed along the outer wall of the metal drill collar; an antenna body is arranged in the groove, and the method comprises the following steps: magnetic materials are attached to the inner wall of the groove, and insulation treatment is carried out between the magnetic materials and the metal drill collar and other antenna materials in the groove; and winding two groups of insulated wire coils on a cylinder which is positioned in the groove and is attached to the magnetic material along the direction perpendicular to the axis of the metal drill collar, wherein one group of insulated wire coils is wound on the other group of insulated wire coils, one group of insulated wire coils is used for transmitting and receiving wireless short transmission signals, and the other group of insulated wire coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals.
2. A method of designing an integrated downhole wireless shorting and resistivity measurement antenna according to claim 1, wherein the space within the recess excluding the two sets of insulated wire coils and the magnetic material is filled with an insulating filler material.
3. The method for designing an integrated antenna for downhole wireless short transmission and resistivity measurement according to claim 2, wherein an antenna protector is provided in the recess and outside the antenna body, a slot is designed in the antenna protector along a direction perpendicular to the winding direction of the insulated wire coil, and a filling material having insulation is filled in the slot.
4. The method for designing an integrated antenna for downhole wireless short transmission and resistivity measurement according to claim 1, wherein the magnetic material has high magnetic permeability and magnetic saturation strength and low resistivity; all properties of the magnetic material have consistency under normal temperature and underground high temperature environments.
5. The method for designing an integrated antenna for underground wireless short transmission and resistivity measurement according to claim 1, wherein the two groups of insulated wire coils are formed by winding a plurality of turns of tightly arranged insulated wires, the thickness of the insulating layers of the insulated wires is 0.02mm-0.05mm, the wire diameter is 0.1mm-1.0mm, and the number of turns is 1-300.
6. The underground wireless short transmission and resistivity measurement integrated antenna device is characterized by comprising an antenna body which is arranged in a column-shaped groove formed along the outer wall of a metal drill collar (1); the antenna body comprises a magnetic material (2), a first coil group (3) and a second coil group (4), wherein the magnetic material (2) is attached to the inner wall of the groove, insulation treatment is carried out between the magnetic material and the metal drill collar (1), the first coil group (3) and the second coil group (4) are multi-turn insulated wires which are wound in the drill collar groove and attached to a cylinder of the magnetic material (2) along the direction perpendicular to the drill collar shaft, the first coil group (3) is wound on the second coil group (4), one group of coils is used for transmitting and receiving wireless short-transmission signals, and the other group of coils is used for transmitting and receiving electromagnetic wave resistivity measurement signals.
7. A downhole wireless short transmission and resistivity measurement integrated antenna device according to claim 6, c h a r a c t e r i z e d in that the space inside the recess except the magnetic material (2), the first coil set (3), the second coil set (4) is filled with a filling material having an insulating property.
8. The underground wireless short transmission and resistivity measurement integrated antenna device according to claim 7, characterized in that an antenna protection cover (7) is arranged outside the antenna body, a slot (8) is designed on the antenna protection cover (7) along the direction perpendicular to the winding direction of the coil assembly, and the slot (8) is filled with a filling material with insulation property.
9. The integrated downhole wireless short transmission and resistivity measurement antenna device according to claim 6, wherein the magnetic material requires higher magnetic permeability and magnetic saturation strength, and has lower resistivity; all properties of the magnetic material have consistency under normal temperature and underground high temperature environments.
10. The underground wireless short transmission and resistivity measurement integrated antenna device according to claim 6, wherein the first coil group (3) and the second coil group (4) are formed by winding a plurality of turns of closely arranged insulated wires, the thickness of the insulated wire insulation layer is 0.02mm-0.05mm, the wire diameter is 0.1mm-1.0mm, and the number of turns is 1-300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210973363.8A CN117627632A (en) | 2022-08-15 | 2022-08-15 | Design method and device of underground wireless short transmission and resistivity measurement integrated antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210973363.8A CN117627632A (en) | 2022-08-15 | 2022-08-15 | Design method and device of underground wireless short transmission and resistivity measurement integrated antenna |
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| Publication Number | Publication Date |
|---|---|
| CN117627632A true CN117627632A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210973363.8A Pending CN117627632A (en) | 2022-08-15 | 2022-08-15 | Design method and device of underground wireless short transmission and resistivity measurement integrated antenna |
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| Country | Link |
|---|---|
| CN (1) | CN117627632A (en) |
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- 2022-08-15 CN CN202210973363.8A patent/CN117627632A/en active Pending
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